This powerful amplifier for ambient sound was found in a documentation from 1941. The output is push-pull using a transformer for phase inversion. The 8-valve circuit has a power of a few tens of watts with several outputs for loudspeakers.

This powerful amplifier for ambient sound was found in a documentation from 1941. The output is push-pull using a transformer for phase inversion. The 8-valve circuit has a power of a few tens of watts with several outputs for loudspeakers.